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<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <a href="url">家用电器</a>
    <a href="url">手机数码</a>
    <a href="url" id="red">日用百货</a>
</body>
<style>
    #red:link{
        color: red;
    }
</style>
</html>